Re: Move unwind info to read-only section on AIX

[Andrew Dixie <andrewdixie50@gmail.com>]

Hi David,

On AIX, mixing objects from different GCC versions should work as long
as the newest GCC is used for linking.  I tested a library with some
objects compiled by GCC-4.4 and some objects compiled by a patched
GCC-5.0.  Exceptions passed through the mixed objects without issue.
Did you have a specific example or reason to think it wouldn't work?

If one attempts to mix C++ objects from GCC-3.3 and GCC-4.4 on Linux
or Solaris there are link time errors.  If you're worried about the
risk of runtime problems, would you rather have a deliberate link time
error on AIX?

Regards,
Andrew

On Wed, Sep 17, 2014 at 6:37 AM, David Edelsohn <dje.gcc@gmail.com> wrote:
> My concern is this really is an ABI change.  One cannot mix object
> files compiled with the old EH format and with the new EH format. One
> can mix shared libraries of different styles, but not object files.
> I'm not certain how much of a problem it is to require recompiling
> everything from scratch.